CN114083838A - Sandwich structure with low-specific-modulus insertion layer and preparation method thereof - Google Patents
Sandwich structure with low-specific-modulus insertion layer and preparation method thereof Download PDFInfo
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- CN114083838A CN114083838A CN202111472833.4A CN202111472833A CN114083838A CN 114083838 A CN114083838 A CN 114083838A CN 202111472833 A CN202111472833 A CN 202111472833A CN 114083838 A CN114083838 A CN 114083838A
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- Prior art keywords
- layer
- low specific
- specific modulus
- modulus
- insert
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- 238000002360 preparation method Methods 0.000 title claims abstract description 6
- 238000003780 insertion Methods 0.000 title claims description 11
- 230000037431 insertion Effects 0.000 title claims description 11
- 239000010410 layer Substances 0.000 claims description 47
- 239000012792 core layer Substances 0.000 claims description 11
- 238000004026 adhesive bonding Methods 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 8
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/045—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/20—Layered products comprising a layer of natural or synthetic rubber comprising silicone rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/10—Properties of the layers or laminate having particular acoustical properties
- B32B2307/102—Insulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
Landscapes
- Laminated Bodies (AREA)
Abstract
The application provides a sandwich structure with a low specific modulus insert layer and a preparation method thereof. The acoustic performance of traditional type light sandwich board relatively poor problem has been solved to this application, and its simple structure, static rigidity is high, and dynamic rigidity is low, and acoustic performance is excellent.
Description
Technical Field
The application belongs to the field of multilayer materials, and particularly relates to a sandwich structure with a low-specific-modulus insertion layer and a preparation method thereof.
Background
The light sandwich structure has the characteristics of excellent light weight, high rigidity and the like, and is widely applied, but the sound vibration transmission characteristic of the light sandwich structure is widely concerned, and the noise generated in the application process is easy to radiate and transmit inwards and outwards through the structure, for example, a turbulent boundary layer is formed on the outer surface of the light sandwich structure in the high-speed flight process of an aircraft, so that very strong random excitation and radiation noise are generated for the shell structure of the aircraft body, and very strong random excitation and radiation noise are generated for the shell structure of the aircraft body.
If the structure is improperly designed or proper noise reduction treatment is not adopted, the attention of a driver is influenced, and the comfort of passengers is reduced; the noise can radiate outwards through the structure, and the production and living environment of residents is affected.
Disclosure of Invention
The application mainly aims to solve the problem that the traditional light sandwich board is poor in acoustic performance, and provides a sandwich structure with a low-specific-modulus insertion layer and a preparation method of the sandwich structure.
In some embodiments of the present application, a sandwich structure having a low specific modulus insert layer includes an upper face sheet, a lower face sheet, a lightweight thick core layer, and a low specific modulus insert layer.
In some embodiments of the present application, the sandwich structure comprises, in order from top to bottom, a top panel, a lightweight thick core layer, a low specific modulus insert layer, a lightweight thick core layer, and a bottom panel.
In some embodiments of the present application, the upper and lower face sheets are sufficiently thin in thickness that the face sheet modulus is sufficiently greater than the core layer modulus.
In some embodiments of the present application, the lightweight thick core layer is a foam core.
In some embodiments of the present application, the low specific modulus insert layer requires that the material density of the insert layer be high, the elastic modulus be low, and the insert layer be made of an elastic material such as rubber or silicone.
In some embodiments of the present application, the low specific modulus insert layer is rubber or silicone.
In some embodiments of the present application, the thickness of the insert layer is 2 to 3 times the thickness of the upper and lower panels.
In some embodiments of the present application, the thickness of the insertion layer is preferably 2mm to 4 mm.
In some embodiments of the present application, a method for preparing a sandwich structure having a low specific modulus insert layer, wherein the layers are bonded by gluing, the surface of the insert layer is roughened by polishing before gluing, and the layers are pressed by a weight for 72 hours after gluing.
Compared with the existing sandwich structure:
1. because the elastic insert layer with lower specific modulus is introduced into the sandwich structure, compared with the traditional sandwich panel, the apparent bending rigidity curve is more quickly attenuated along with the increase of frequency, and the mechanical characteristics of higher static and lower dynamic are shown, so that the sound insulation performance is obviously improved.
2. The elastic layer with lower specific modulus is introduced into the middle of the core layer of the traditional sandwich structure, so that the shear modulus of the core layer can be greatly reduced, and the sandwich wall plate is favorable for reducing the sound radiation of the sandwich wall plate.
3. The elastic insert layer ensures that the acoustic radiation is reduced without reducing the static stiffness of the entire structure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of a sandwich structure in an embodiment of the present application;
1-upper panel 2-foam core 3-resilient insert 4-foam core 5-lower panel.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
With reference to fig. 1, a sandwich structure with low specific modulus insert layers comprises, from top to bottom, an upper panel 1, a foam core 2, a resilient insert layer 3, a foam core 4, and a lower panel 5.
The low specific modulus insertion layer is made of elastic materials such as rubber and silica gel, and is required to be high in material density and low in elastic modulus.
The thickness of the insertion layer is 2.5 times of the thickness of the upper panel and the lower panel, and the thickness of the insertion layer is 3 mm.
A method for preparing a sandwich structure with an insertion layer with low specific modulus comprises the steps of gluing the layers, polishing the surface of the insertion layer to be rough before gluing, and pressing the layers for 72 hours by using a weight after gluing.
This application sandwich structure has proposed to introduce the elastic layer that the modulus is lower in the middle of the sandwich layer of traditional sandwich structure, compares with typical sandwich board, and its apparent bending stiffness curve is along with the increase of frequency, and the decay is more rapid, demonstrates the mechanical properties of "high quiet low dynamic" more, and then is showing and improves sound insulation performance.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (8)
1. A sandwich construction having a low specific modulus insert layer, characterised in that it comprises an upper face sheet, a lower face sheet, a lightweight thick core layer and a low specific modulus insert layer.
2. Sandwich construction with low specific modulus interleaf layers according to claim 1,
the sandwich structure sequentially comprises an upper panel, a light thick core layer, a low specific modulus insert layer, a light thick core layer and a lower panel from top to bottom.
3. Sandwich construction with low specific modulus interleaf layers according to claim 1,
the light thick core layer is a foam core.
4. A sandwich construction with a low specific modulus insert according to claim 1 wherein the low specific modulus insert requires a high material density and a low modulus of elasticity of the insert.
5. Sandwich construction with low specific modulus interleaf layers according to claim 1,
the low specific modulus insert layer is rubber or silica gel.
6. Sandwich construction with low specific modulus interleaf layers according to claim 1,
the thickness of the insertion layer is 2-3 times of the thickness of the upper panel and the lower panel.
7. A sandwich construction having a low specific modulus insert layer according to claim 1 wherein the insert layer has a thickness of from 2mm to 4 mm.
8. A process for the preparation of a sandwich construction having a low specific modulus interleaf layer according to any one of claims 1 to 7 wherein the layers are bonded together by gluing, the surface of the interleaf layer is roughened prior to gluing, and after the layers have been glued together, the layers are compacted for 72 hours using a weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472833.4A CN114083838A (en) | 2021-12-03 | 2021-12-03 | Sandwich structure with low-specific-modulus insertion layer and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111472833.4A CN114083838A (en) | 2021-12-03 | 2021-12-03 | Sandwich structure with low-specific-modulus insertion layer and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114083838A true CN114083838A (en) | 2022-02-25 |
Family
ID=80306530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111472833.4A Pending CN114083838A (en) | 2021-12-03 | 2021-12-03 | Sandwich structure with low-specific-modulus insertion layer and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114083838A (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992020523A1 (en) * | 1991-05-21 | 1992-11-26 | Divinycell International Ab | Sound-damping sandwich material and a method for its manufacture |
| WO2000075443A1 (en) * | 1999-06-09 | 2000-12-14 | The Dow Chemical Company | Sound-insulating sandwich element |
| DE102006056612A1 (en) * | 2005-11-30 | 2007-05-31 | Hafellner, Reinhard, Dipl.-Ing. | Production of sandwich-type composite for lightweight constructions, e.g. inside cars, involves cutting a core layer from a rigid foam block with an unserrated blade and glueing on tensionally-rigid film as outer layers |
| US20090250293A1 (en) * | 2008-04-04 | 2009-10-08 | Airbus Deutschland Gmbh | Acoustically optimized cabin wall element |
| CN102080745A (en) * | 2009-11-26 | 2011-06-01 | 现代自动车株式会社 | Low-noise plastic intercooler pipe having multi-layered structure |
| CN103456292A (en) * | 2012-05-29 | 2013-12-18 | 中国科学院声学研究所 | Three-layer composite material with flame retardance and sound absorption functions |
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| CN107351852A (en) * | 2017-06-29 | 2017-11-17 | 常州诺法新材料科技有限公司 | Light fibre enhancing phenolic aldehyde sandwich sheet material and preparation method thereof |
| US20180054678A1 (en) * | 2016-08-22 | 2018-02-22 | 4A Manufacturing Gmbh | Temperature stable membrane plate structure for a loudspeaker |
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| US20190277082A1 (en) * | 2016-11-10 | 2019-09-12 | Simon MILLARD | Panels |
| CN111739501A (en) * | 2020-06-01 | 2020-10-02 | 南京航空航天大学 | Underwater sound absorption structure of damping lining level honeycomb perforated plate |
| CN111739502A (en) * | 2020-06-01 | 2020-10-02 | 南京航空航天大学 | Underwater sound absorption metamaterial with damping lining hexagonal honeycomb perforated plate |
| CN111739500A (en) * | 2020-06-01 | 2020-10-02 | 南京航空航天大学 | Underwater broadband sound absorption structure of perforated sandwich plate modified by damping layer |
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-
2021
- 2021-12-03 CN CN202111472833.4A patent/CN114083838A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992020523A1 (en) * | 1991-05-21 | 1992-11-26 | Divinycell International Ab | Sound-damping sandwich material and a method for its manufacture |
| WO2000075443A1 (en) * | 1999-06-09 | 2000-12-14 | The Dow Chemical Company | Sound-insulating sandwich element |
| DE102006056612A1 (en) * | 2005-11-30 | 2007-05-31 | Hafellner, Reinhard, Dipl.-Ing. | Production of sandwich-type composite for lightweight constructions, e.g. inside cars, involves cutting a core layer from a rigid foam block with an unserrated blade and glueing on tensionally-rigid film as outer layers |
| US20090250293A1 (en) * | 2008-04-04 | 2009-10-08 | Airbus Deutschland Gmbh | Acoustically optimized cabin wall element |
| CN102080745A (en) * | 2009-11-26 | 2011-06-01 | 现代自动车株式会社 | Low-noise plastic intercooler pipe having multi-layered structure |
| CN103456292A (en) * | 2012-05-29 | 2013-12-18 | 中国科学院声学研究所 | Three-layer composite material with flame retardance and sound absorption functions |
| US20180054678A1 (en) * | 2016-08-22 | 2018-02-22 | 4A Manufacturing Gmbh | Temperature stable membrane plate structure for a loudspeaker |
| US20190277082A1 (en) * | 2016-11-10 | 2019-09-12 | Simon MILLARD | Panels |
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| CN111739501A (en) * | 2020-06-01 | 2020-10-02 | 南京航空航天大学 | Underwater sound absorption structure of damping lining level honeycomb perforated plate |
| CN111739502A (en) * | 2020-06-01 | 2020-10-02 | 南京航空航天大学 | Underwater sound absorption metamaterial with damping lining hexagonal honeycomb perforated plate |
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